500px.com Ranking Algorithm

Posted by alex on Stack Overflow See other posts from Stack Overflow or by alex
Published on 2012-04-12T10:50:06Z Indexed on 2012/04/12 11:29 UTC
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algorithm

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comments

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like

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ranking

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rating-system

I was recently wondering how http://500px.com calculates their "Pulse" rating. The "Pulse" is a score from 1..100 based on the popularity of the photo.

I think it might use some of the following criteria:

Number of likes
Number of "favorites"
Number of comments
Total views
maybe the time since the photo has been uploaded
maybe some other non-obvious criteria like the users follower count, user rank, camera model or similar

How would I achieve some sort of algorithm like this?

Any advice on how to implement an algorithm with this criteria (and maybe some code) would be appreciated too.

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